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I honestly have no idea what got the last thread deleted. Really nothing in there had any kind of behavior that hasn't been seen here before, or even recently, and not even a warning from moderators either.

Interesting details on the inlet (brace supporting the upper outer corner, already seen on 058, having checked back) - also first instance of 101KS-P (not installed, but the aperture is clearly there)?

also first instance of 101KS-P (not installed, but the aperture is clearly there)?

What is the function of 101KS-P? The IRST is gone this time. A dummy is there instead.

The maws,laser emissions warner suite on the Su-35S is much more compact and occupies less volume compared to the KS-U. Still instead of going for a proven solution like the maws suite for the Su-35s, Sukhoi opted for w whole new design for the Pak-fa. Is it possible that the KS-U offers more functionality than that suite. Like rather than just being a maws suite,it provides IR imagery of the surroundings and increases the situational awarness of the pilot in the manner of AAQ-37.

India should co-produce stealth fighter with Russia, says top panel
“We were given a task and we have submitted our report to the government. That’s all I can tell you,” Varthaman told HT, refusing to share the details of the report. The committee has pointed out that India would significantly gain from partnering with Russia through the transfer of cutting-edge technology, sources said. The four-member panel looked into various aspects of the project for around five months.

Hey, is there any sort of official page (user, manufacturer) or official claim (high ranking official cited by name in an interview) which offers thrust figures for 117 engine for Su-57? I recently realized 117S engine has such sources, but 117 variant is more elusive... But I could be just looking in the wrong places.

117 engine has thrust of 14.5 - 15 T , It is 150 Kg lighter compared to Al-31/117S series engine and has 80 % new components compared to 117S engine .....All this has been mentioned in different official interview by designer from time to time.

Russia’s fifth-generation stealth fighter jet will have a custom made new engine, Sukhoi General Director Mikhail Pogosyan said.
“Claims that the fifth-generation jet allegedly has an old engine are wrong. Such claims are made by people with limited knowledge,” he said.

The Saturn Research and Production center made digitally-controlled engines of Project 117 for the new jet. The engine thrust was enlarged by 2.5 tonnes, as compared with the AL-31 engines, while the engine weight was cut by 150 kilograms. That allowed the new jet to move at a supersonic cruise speed, Pogosyan said.

“This engine meets the client’s requirements. This is not an intermediate product made particularly for test flights. The engine will be installed in jets, which will be supplied to the Russian Air Force and prospective foreign clients,” he said.

There will be another engine in the future, but it will take ten to twelve years to develop, Pogosyan said.

http://vpk-news.ru/articles/8228
interview with "MIC" Yevhen Marchuk, chief designer and director of the Scientific and Technical Center named after a . Swinging IV - branch of JSC "NPO" Saturn "United Engine Building Corporation.

Here is the engine for the PAK FA will surpass even though all the parameters already established motors, however will be made using the already available scientific and technical base. Of course, there will be new ceramic materials can withstand very high temperatures. High-pressure turbine can operate without cooling blades, bearings - no lubrication. Inlet temperature exceeds the temperature of the combustion theater kerosene at 2300 degrees. This will limit opportunities to improve the parameters of modern aircraft engines. The current shape of the engine will continue for fifteen to twenty years. Much depends on how quickly begin to improve material properties.

Q- This is a more distant prospect. Let's still talk about our time. What is the current engine for the PAK FA?

Now for the PAK FA engine is made with the symbol "product 117". He is at the stage of preliminary test - bench and flight, which take place successfully. Some elements borrowed from developments in the creation of the engine "117S" for the Su-35, in particular the methods and design calculations, process technology complex structural elements.

Engine "117C" - is by no means an easy upgrade of the AL-31F, as sometimes you can read in the press. Thrust on his two tons higher than the AL-31F. Get these two tons in the same dimensions is not easy. The engine is a new low-pressure compressor. Substantially upgraded high-pressure compressor. The new combustion chamber. The new turbine. Almost all new units. The engine is 80 percent of new parts.

And the "product 117" for the PAK FA first stage (T-50) pull more than the "117C". In addition, it is a fundamentally new system of automatic control system (ACS) - fully digital, with full responsibility. For the first time it will be built at the Russian element basis. Architecture of the system, the control algorithm and its Russian counterparts. We want the cell and the base was Russian, although we have a list of permits for the use of foreign bases. Such a domestic engine building was not yet. To solve this problem of the Russian Federation Industry and Trade Ministry allocates funds. Carried out research work under the name "ACS promising products." Selected a good team of designers ACS, there is a certain reserve, and we are confident of success.

Military engines has more science involved. it is not just upgrade of previous engines like civil engines.

https://www.plm.automation.siemens.c...mponent=204766
Launching the PAK FA ahead of time
The T-50 fifth generation multirole fighter is a milestone project for the Russian aerospace industry. NPO Saturn is participating along with other companies of United Engine Corporation. The primary developer is the Lyulka Engineering Center’s Moscow office. “Product 117” is the in-house name of the engine intended for the advanced front-line stealth aircraft, the PAK FA.

According to Zelenkov, Siemens PLM Software’s technologies have helped NPO Saturn to significantly reduce engine development time. “Military developments are more science-driven than commercial ones,” he says. “For example, materials science plays an important role. That is why it takes more time. Still, Product 117 has been developed ahead of time thanks to digital modeling and early engineering analysis.”

@FBW Check the interview he mentiones the following differences between 117 and 117S

there will be new ceramic materials can withstand very high temperatures.
High-pressure turbine can operate without cooling blades, bearings - no lubrication.
Inlet temperature exceeds the temperature of the combustion theater kerosene at 2300 degrees.
The engine is a new low-pressure compressor.
Substantially upgraded high-pressure compressor.
The new combustion chamber.
The new turbine.
Almost all new units

Add to that a weight reduction of 150 kg which is no small achievement , reducing 1 Kg of weight is a challange